Vaillant ecoTEC Pro 28 Combi F.27 – Safety switch-off: Flame simulation

F.27

Safety switch-off: Flame simulation

Vaillant ecoTEC Pro 28 Combi

Possible cause

Monitoring electrode reports an incorrect flame

Measure

Check: Gas pressure at upper test opening, monitoring electrode, PCB, gas solenoid valve.

This code also applies to: